如何使用send_file下载文件? [英] How to download file with send_file?

问题描述

有人可以启发我如何使用send_file下载文件吗?

Can someone enlighten me how can I download file with send_file?

我在app/assets/images中有一个文件image.jpg.我已经在控制器中尝试过此操作:

I have a file image.jpg inside app/assets/images. I've tried this in my controller:

def download
    send_file ("#{Rails.root}/public/images/image.jpg")
end

def download
    send_file ("#{Rails.root}/assets/images/image.jpg")
end

def download
    send_file ("#{Rails.root}/images/image.jpg")
end

def download
    send_file ("/public/images/image.jpg")
end

def download
    send_file ("/assets/public/images/image.jpg")
end

def download
    send_file ("/assets/images/image.jpg")
end

对于每个路径，它说:

ActionController::MissingFile in HomeController#download
Cannot read file 'some_path'

这可能是个问题吗?谢谢！

What could be a problem here? Thanks!

推荐答案

尝试:

IMAGES_PATH = File.join(Rails.root, "public", "images")

def download
  send_file(File.join(IMAGES_PATH, "image.jpg"))
end

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